140 lines
4.7 KiB
Diff
140 lines
4.7 KiB
Diff
From 05c1df09c70cd0ed48f0644890f69a0128b17a98 Mon Sep 17 00:00:00 2001
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From: Lulu Cheng <chenglulu@loongson.cn>
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Date: Fri, 29 Jul 2022 09:44:52 +0800
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Subject: [PATCH 008/124] LoongArch: Define the macro
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ASM_PREFERRED_EH_DATA_FORMAT by checking the assembler's support for eh_frame
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encoding.
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.eh_frame DW_EH_PE_pcrel encoding format is not supported by gas <= 2.39.
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Check if the assembler support DW_EH_PE_PCREL encoding and define .eh_frame
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encoding type.
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gcc/ChangeLog:
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* config.in: Regenerate.
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* config/loongarch/loongarch.h (ASM_PREFERRED_EH_DATA_FORMAT):
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Select the value of the macro definition according to whether
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HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT is defined.
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* configure: Regenerate.
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* configure.ac: Reinstate HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT test.
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Signed-off-by: Peng Fan <fanpeng@loongson.cn>
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Signed-off-by: ticat_fp <fanpeng@loongson.cn>
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---
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gcc/config.in | 8 +++++++-
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gcc/config/loongarch/loongarch.h | 5 +++++
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gcc/configure | 34 ++++++++++++++++++++++++++++++++
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gcc/configure.ac | 8 ++++++++
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4 files changed, 54 insertions(+), 1 deletion(-)
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diff --git a/gcc/config.in b/gcc/config.in
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index 64c27c9cf..67ce422f2 100644
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--- a/gcc/config.in
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+++ b/gcc/config.in
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@@ -404,13 +404,19 @@
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#endif
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+/* Define if your assembler supports eh_frame pcrel encoding. */
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+#ifndef USED_FOR_TARGET
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+#undef HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT
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+#endif
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+
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+
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/* Define if your assembler supports the R_PPC64_ENTRY relocation. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_AS_ENTRY_MARKERS
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#endif
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-/* Define if your assembler supports explicit relocations. */
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+/* Define if your assembler supports explicit relocation. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_AS_EXPLICIT_RELOCS
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#endif
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diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h
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index 12f209047..a52a81adf 100644
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--- a/gcc/config/loongarch/loongarch.h
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+++ b/gcc/config/loongarch/loongarch.h
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@@ -1130,8 +1130,13 @@ struct GTY (()) machine_function
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};
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#endif
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+#ifdef HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT
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+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
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+ (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
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+#else
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
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(((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_absptr)
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+#endif
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/* Do emit .note.GNU-stack by default. */
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#ifndef NEED_INDICATE_EXEC_STACK
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diff --git a/gcc/configure b/gcc/configure
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index 840eddc7c..3788e240a 100755
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--- a/gcc/configure
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+++ b/gcc/configure
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@@ -28857,6 +28857,40 @@ if test $gcc_cv_as_loongarch_explicit_relocs = yes; then
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$as_echo "#define HAVE_AS_EXPLICIT_RELOCS 1" >>confdefs.h
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+fi
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+
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+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for eh_frame pcrel encoding support" >&5
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+$as_echo_n "checking assembler for eh_frame pcrel encoding support... " >&6; }
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+if ${gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support+:} false; then :
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+ $as_echo_n "(cached) " >&6
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+else
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+ gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support=no
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+ if test x$gcc_cv_as != x; then
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+ $as_echo '.cfi_startproc
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+ .cfi_personality 0x9b,a
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+ .cfi_lsda 0x1b,b
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+ .cfi_endproc' > conftest.s
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+ if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5'
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+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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+ (eval $ac_try) 2>&5
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+ ac_status=$?
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+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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+ test $ac_status = 0; }; }
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+ then
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+ gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support=yes
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+ else
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+ echo "configure: failed program was" >&5
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+ cat conftest.s >&5
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+ fi
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+ rm -f conftest.o conftest.s
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+ fi
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+fi
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support" >&5
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+$as_echo "$gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support" >&6; }
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+if test $gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support = yes; then
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+
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+$as_echo "#define HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT 1" >>confdefs.h
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+
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fi
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;;
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diff --git a/gcc/configure.ac b/gcc/configure.ac
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index 975c852c6..1c376e0d4 100644
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--- a/gcc/configure.ac
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+++ b/gcc/configure.ac
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@@ -5324,6 +5324,14 @@ x:
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[a:pcalau12i $t0,%pc_hi20(a)],,
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[AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
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[Define if your assembler supports explicit relocation.])])
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+ gcc_GAS_CHECK_FEATURE([eh_frame pcrel encoding support],
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+ gcc_cv_as_loongarch_eh_frame_pcrel_encoding_support,,
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+ [.cfi_startproc
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+ .cfi_personality 0x9b,a
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+ .cfi_lsda 0x1b,b
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+ .cfi_endproc],,
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+ [AC_DEFINE(HAVE_AS_EH_FRAME_PCREL_ENCODING_SUPPORT, 1,
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+ [Define if your assembler supports eh_frame pcrel encoding.])])
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;;
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s390*-*-*)
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gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
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--
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2.33.0
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